The disclosure relates to a pivot axle arrangement for providing the two structural elements are pivotally movable in relation to each other. The pivot axle arrangement comprises a first and a second axle spindle for holding an outer axle, a first and a second bearing element and the outer axle. The outer axle is formed as a hollow cylinder. An inner axle is concentrically arranged in a longitudinal direction inside of the outer axle such that the inner axle extends between said first and second axle spindle. The ends of the inner axle are fastened to the first and second axle spindles by a first and second fastening means such that the first and second axle spindles are interconnected via said inner axle.
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1. A radar antenna arrangement, comprising:
a pivot axle arrangement for providing that two structural elements arranged to said pivot axle arrangement are pivotally movable in relation to each other, said pivot axle arrangement comprising:
a first and a second axle spindle for holding an outer axle, wherein said first axle spindle comprises a first axle support portion and a first fastener support portion and said second axle spindle comprises a second axle support portion and a second fastener support portion,
a first and a second bearing element, wherein said first bearing element is arranged to said first axle support portion of said first axle spindle and said second bearing element is arranged to said second axle support portion of said second axle spindle,
the outer axle, wherein said outer axle is formed as a hollow cylinder and wherein said outer axle is provided with a first and a second end portion arrangement at respective opposite end of said outer axle, wherein also said first and second end portion arrangements are formed as hollow cylinders,
wherein said first and second end portion arrangement of said outer axle are arranged to said first and second bearing element such that said outer axle is pivotally arranged in relation to said first and second axle spindles,
wherein: an inner axle, having a first and second inner axle end wherein said first and second inner axle ends are provided on opposite ends of said inner axle, is concentrically arranged in a longitudinal direction inside of said outer axle and in that said inner axle extends between said first and second axle spindle, wherein said first and second inner axle end is fastened to said first and second axle spindle by a first and second fastening means, such that said first and second axle spindle are interconnected via said inner axle
a second structural element in form of a fastening structure, wherein said fastening structure comprising two pivot axle fasteners, said pivot axle arrangement is mountable to said fastening structure, and
a first structural element comprising a mast and a transmitting device, wherein said mast of said first structural element is arranged said pivot axle arrangement and wherein said transmitting device is arranged to said mast, wherein said first and second structural element are pivotally arranged to each other by said pivot axle arrangement.
2. The radar antenna arrangement according to
3. The radar antenna arrangement according to
4. The radar antenna arrangement according to
5. The radar antenna arrangement according to
6. The radar antenna arrangement according to
7. The radar antenna arrangement according to
8. The radar antenna arrangement according to
9. The radar antenna arrangement according to
10. The radar antenna arrangement according to
11. The radar antenna arrangement according to
that a threaded opening is provided in said axle support portion or in said first or second attachment portion of said first or second axle fastening portion, and
that at least one of said first and second inner axle end is provided with an outwardly threaded end, wherein
said threaded opening and said outwardly threaded end are configured such that said outwardly threaded end may be screwed into said threaded opening.
12. The radar antenna arrangement according to
that said second attachment portion of said second axle support portion is provided with a second opening,
that said inner axle is provided with an outwardly threaded end, and
a screw-nut, wherein
when said pivot axle arrangement is assembled said outwardly threaded end is guided through said second opening and said screw-nut is screwed onto said outwardly threaded end such that said screw-nut is locking said outwardly threaded end from being retracted out of said second opening.
13. The radar antenna arrangement according to
that said first attachment portion is provided with a first opening,
that said inner axle is provided with an inner axle threaded opening in one of said first or second inner axle ends, and
an outwardly threaded member with a head, wherein
when said pivot axle arrangement is assembled said outwardly threaded member is configured to be guided through said first opening and screwed into said inner axle threaded opening, wherein said head of said outwardly threaded member has a larger outer circumference than an inner circumference of said first opening, such that when said outwardly threaded member is screwed into said inner axle threaded opening said outwardly threaded member is locking said inner axle from being retracted out of said first opening.
14. The radar antenna arrangement according to
15. A method for assembling the radar antenna arrangement according to
mounting a first end of an outer axle to a first axle spindle, wherein a first bearing element is arranged between said first axle spindle and a first end portion arrangement of said outer axle,
assembling a first end of an inner axle to said first axle spindle by means of a first fastening means,
arranging an assembling tool to a second end of said inner axle such that said inner axle may be held in a first position suitable for mounting a second axle spindle,
aligning a second opening of said second axle spindle with an longitudinal direction of said assembling tool,
guiding said second axle spindle along said assembling tool such that:
a second end of said inner axle is adjacent to said second opening, and
a second end portion arrangement of said second end of said outer axle is mounted to said second axle spindle via a second bearing element, and
fastening said second end of said inner axle to said second axle spindle by means of a second fastening means.
16. A radar antenna arrangement according to
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This application is a U.S. National Stage application of PCT/SE2014/051553, filed 19 Dec. 2014 and published on 23 Jun. 2016 as WO 2016/099366 which is hereby incorporated by reference in its entirety.
The present disclosure relates to a pivot axle arrangement for providing two structural elements to be pivotally movable in relation to each other. The disclosure is applicable for pivot joints where stringent requirements apply regarding rigid construction. The present disclosure is suitable e.g. for a pivotally radar antenna. Although the disclosure will be described with respect to a radar antenna, the present disclosure is not restricted to this particular use.
Pivot joints arranged for facilitating that structural elements such as an antenna, a mast or like may be pivoted between an upraised position and a lowered position is generally exposed to significant forces in essentially all directions. The antenna or like may itself be quite heavy and in upraised position also the height of the antenna, especially when being exposed to e.g. wind, imply great stress to the joint where the pivotally antenna is fastened. For applications where the antenna or like is fastened by a pivot joint to a vehicle the pivot joint will also be exposed to other forces e.g. during transport in harsh terrain. In order for the pivot joint to work properly at such conditions, not wear down to quickly and not be dislocated the material thickness of the components associated with the pivot joint often have to be larger than what is desired and the requirements regarding manufacturing tolerances are often very restrictive. Small tolerances and excessive material thickness are undesirable from a cost and weight perspective.
Conventional pivot joints for pivotally antennas or like generally consist of a pivot axle which is rotationally arranged at respective end in a pivot axle fastener. Both pivot axle fasteners contributes to absorbing forces in radial direction exerted on the pivot axle but only one of the pivot axle fasteners absorb the forces if being applied in a direction essentially parallel with the pivot axle. Thus, if such a pivot joint is exposed to shock forces, for example during transport when driving on a bumpy road, in an axial direction there is an imminent risk that the pivot axle will be separated from the pivot axle fastener if not the pivot axle fastener is sufficiently rigid.
However, it is not sufficient that the pivot axle fasteners are sufficiently rigid. Also the structural element on which the pivot axle fasteners are arranged needs to be able to absorb the forces exerted by the pivot axle fasteners. If being arranged on a vehicle, such structural element may e.g. be a load platform of a truck or the roof of a terrain vehicle. Thus also the load platform, the roof etc. needs to be designed or reinforced in order to prevent the pivot axle from been dislocated from axial forces.
When in upraised position, and during operation when the antenna is rotating, another aspect that needs to be considered is the mechanical resonance. Mechanical resonance is the tendency of a mechanical structure to respond at greater amplitude when the frequency of its oscillations matches the natural frequency of the structure. A rotating antenna exposed to incident wind will be exposed to a pulsating force due to that the surface of the antenna that is exposed to the incident wind will vary as the antenna rotates. Such pulsating force may cause the antenna structure to start to oscillate. If such oscillations coincide with the natural frequency of the structure the oscillations will escalate which ultimately may break the antenna structure. For a radar antenna the performance of the antenna will also be significantly impaired by such oscillations. The oscillation caused is dependent on the rotating speed of the antenna.
A rigid fastening, without any glitches, raises the natural frequency wherein the natural frequency may be raised to be higher than the frequencies which the antenna structure may be exposed to due to rotating in windy conditions. A rigid antenna structure and rising of the natural frequency improves the stability and durability of the antenna. Also, the more stable the antenna is, the better, and more accurate, will e.g. a radar image obtained by such an antenna be.
In order for a pivot joint to work properly it is also important that the inherent pivot resistance, counteracting the pivot movement of the joint, is configured accurately. For applications where a pivot joint is used for lowering and raising antennas or like the inherent pivot resistance is important for dampening the rotational movement since the leverage effect is significant, especially when lowering the antenna. However, as the pivot joint is being worn the inherent pivot resistance will gradually decrease, wherein the dampening effect will be lost.
Thus, there is a need for further improvements.
An object of the present disclosure is to provide a pivot axle arrangement overcoming the previously mentioned drawbacks. The object is achieved by the present disclosure according to claim 1. A further object of the present disclosure is to provide a pivot axle arrangement with increased lifetime and improved durability. Yet a further object of the present disclosure is to provide a method for assembling the pivot axle arrangement. Further effects are provided by the present disclosure as disclosed in the dependent claims and throughout the specification.
Pivot joints are generally designed to absorb forces in radial direction. However, pivot joints used for the application primarily addressed herein, pivot joints for enabling e.g. a radar antenna to be pivotally arranged on the roof of a terrain vehicle or like, are also exposed to significant force in axial direction. When a conventional pivot joint, such as the exemplifying prior art pivot joint described in relation to
This problem is solved by the present disclosure by providing a more stable pivot axle arrangement. By providing a more stable pivot axle arrangement the pivot axle fasteners do not have to be as strong and rigid, thus also the structure the pivot axle fastener is arranged to do not have to be as strong and rigid.
The present disclosure comprises a pivot axle arrangement for providing that two structural elements, arranged to the pivot axle arrangement, are pivotally movable in relation to each other. Examples of such structural elements may e.g. be a radar antenna, a radar mast or like that is pivotally mounted on the roof of a vehicle or on a building.
The pivot axle arrangement comprises
The first and second end portion arrangement of the outer axle is pivotally mounted to the first and second bearing element of the first and second axle spindle such that the outer axle is pivotally arranged in relation to the first and second axle spindles. The axle support portions, provided with the bearing elements, are configured to protrude into respective first and second end portion arrangement of the outer axle such that the axle support portions are rotationally arranged to respective first and second end portion arrangements via the bearing elements. The first and second fastener support portions are preferably arranged in a first and second pivot axle fastener of a structural element. The present disclosure is further characterized in that an inner axle, having a first and second inner axle end provided on opposite ends of the inner axle, is concentrically arranged in a longitudinal direction inside of the outer axle. The inner axle extends between the first and second axle spindle and the first and second inner axle ends are fastened to the first and second axle spindles by a first and second fastening means. Depending on how the fastening means are designed, which is something that will be discussed more in detail later, the inner axle may either extend into respective axle spindle, just to respective axle spindle or close to respective axle spindle. The first and second axle spindles are interconnected via the inner axle, and respective first and second inner axle end is fastened to respective first and second axle spindle by the first and second fastening means. Thereby the first and second axle spindles are prevented from being further separated in an axial direction by the inner axle. When in operation the outer axle may rotate, wherein a structural element arranged to the outer axle may be pivoted, whereas the inner axle is fixated and does not rotate.
Preventing the axle spindles from separating has the advantage that when an axial force is acting on the pivot axle arrangement both axle spindles, thus both pivot axle fasteners in which the axle spindles are arranged when in use, contribute to absorbing the axial force instead of just one of the axles spindles. This has the advantage that the pivot axle fasteners do not need to be dimensioned to withstand as large forces one by one, and also the surrounding structural elements may not need to be able to withstand the same forces since the forces propagating through pivot axle fasteners is divided between two fasteners instead of just one.
For clarification; the present disclosure relates to a pivot axle arrangement comprising two axle spindles, an intermediate outer axle and an inner axle, arranged concentrically of the outer axle and provided such that the inner axle interconnects the axle spindles by fastening means. An axle spindle comprises an axle support portion and a fastener support portion. Respective axle support portion of respective axle spindle is arranged in a pivot axle fastener. The pivot axle fasteners may in turn be arranged to any structural element to which it is desirable to arrange a pivot axle arrangement. This is further disclosed in the figures and related detailed description.
According to examples of the present disclosure the first and second axle support portion has smaller cross sectional area, also referred to as a transverse area, than a cross sectional area of the first and second fastener support portion.
The outer axle has a first inner diameter and the first and second end portion arrangements have a second axle inner diameter. According to examples of the present disclosure the second axle inner diameter is smaller than the first axle inner diameter. This means that a through-hole extending through respective end portion arrangement is narrower than the through-hole extending through the outer axle, which as previously stated also is in form of a hollow cylinder. The first and second end portion arrangements may either be a part of the outer axle, formed from the same piece of material according to any possible manufacturing method, or be separate parts mounted at respective opposite first and second ends of the outer axle.
According to other examples of the present disclosure the first and second end portion arrangement is configured to be arranged at least partially inside the outer axle. Thus, at least a portion of the first and second end portion arrangement has a smaller outer diameter than the first inner axle diameter of the outer axle. This means that the first and second end portion arrangements either may be mounted inside of the outer axle at respective first and second end or that at least a portion of the first and second end portion arrangements extends into respective first and second end of the outer axle.
By providing the outer axle with a first and second end portion arrangement at respective first and second end of the outer axle it is not necessary that the axle support portions of the axle spindles are configured directly according to the first inner diameter of the outer axle. The important aspect is that respective end portion arrangement is configured according to respective axle support portion, including the bearing element, of the axle spindle. This may be advantageous from a mounting and manufacturing perspective.
According to yet other examples of the present disclosure the first and second end portion arrangements are just an outer portion of the first and second ends of the hollow cylinder forming the outer axle. According to these examples the first inner diameter and the second inner diameter is the same. This is a very easy, and less costly, approach.
According to other examples of the present disclosure the first and second axle spindle additionally comprises a first and second abutting portion. The first and second abutting portion is provided between respective first or second axle support portion and respective first or second fastener support portion. A surface of the abutting portion is essentially perpendicular to an outer surface of the axle support portion and the fastener support portion.
According to yet other examples of the present disclosure the first or second bearing element comprises of at least one plain bearing. According to other examples the first or second bearing element additionally comprises a first and second radial bearing flange. The first and second radial bearing flange extends in a radial direction, wherein the radial direction is essentially perpendicular in relation to the longitudinal extension direction of the first or second bearing element.
The radial bearing flanges are provided to form bearings between the axle spindles and the outer axles, or to be more precise to form bearing between respective abutting portion of respective axle spindle and a transverse surface of respective end portion arrangement of the outer axle. The transverse surfaces are the cross sectional surfaces of the outer axle at respective end portion arrangement. Thus, the transverse surfaces of the outer axle are provided at respective end of the outer axle essentially perpendicular to the longitudinal direction of the outer axle.
The first and second radial bearing flanges are provided for absorbing forces in axial direction. In order not to wear on respective abutting portion, and/or to form a surface against which the transverse end surface of the end portion arrangement of the outer axle can rotate, when axial forces, e.g. generated from load shock or like, are applied it is preferred that respective abutting portion is covered by a radial bearing flange. The radial bearing flanges are preferably covering at least the part of respective abutting portion against which the transverse surface of the end portion arrangement abuts.
Depending on how the pivot joint, comprising the pivot axle arrangement and pivot axle fasteners is used, and depending on in which application the pivot joint is used, the wear of the radial bearing flange and the part of the bearing element extending in the axial direction, and thus enclosing at least a longitudinal portion of the axle support portion of the axle spindle, may be significantly different. Thus, according to some examples of the present disclosure the radially extending portion of the bearing element and the axially extending portion of the bearing element may be two separate bearings, together forming the bearing element. Having the radially extending portion separate from the axially extending portion enables that, if e.g. the wear of the radially extending portion is more severe than the wear of the axially extending portion, the radially extending portion can be replaced more frequently than the axially extending, or vice versa. This may save cost and also, just replacing the radially extending portion may require less structural engagement. There are also other obvious configurations, with different obvious advantages and drawbacks, of how the bearing element may be designed, all which are considered to fall under the wide concept of bearing element. E.g. the bearing element may not consist of one plain bearing but of two, layered plain bearings. Such configuration may be advantageous from a durability perspective.
According to examples of the present disclosure the first and second fastener support portion and the first and second axle support portion are formed as essentially hollow cylinders, wherein a through-hole is formed in the longitudinal direction of respective fastener support portion. As will be disclosed more in detail later, for certain examples of the present disclosure this is an important feature in order to be able to mount the pivot axle arrangement. Further, the first axle support portion is provided with a first attachment portion and the second axle support portion is provided with a second attachment portion. The first and second attachment portions are forming a surface covering the cross sectional area of respective first or second support portions in which the first and second fastening means is fastened. The attachment portions are provided perpendicularly, or near perpendicular, to a longitudinal direction of respective axle support portion.
The attachment portion may be provided either within the cylinder formed by the fastener support portion or within the cylinder formed by the axle support portion. According to certain examples of the present disclosure the attachment portion is provided at the outer end of the axle support portion that is closest to the fastener support portion. According to other examples the attachment portion is provided at the outer end of the axle support portion that is facing away from the fastener support portion.
Providing the attachment portion at the outer end that is closest to the fastener support portion may be advantage from a stability and assembling perspective whereas providing the attachment portion at the outer end that is facing away from the fastener support portion may be advantage since the inner axle can be shorter, which may improve stability.
According to other examples of the present disclosure at least one of the first and second fastening means is provided with adjustment means. The adjustment means are configured for adjusting the pressure exerted by the abutting portion on the end portion arrangement of the outer axle. In examples of the present disclosure where the bearing elements comprise radial bearing flanges the force exerted by the abutting portion on the end portion arrangement will be exerted via respective radial bearing flange which is provided between the abutting portion and the end portion arrangement, i.e. between the abutting portion and the transverse surface of the abutting portion. By controlling the pressure the abutting portion is exerting on the end portion arrangements of the outer axle it is possible to ensure that the construction is free of glitches and to control the friction between the radial bearing flange of the bearing element and the end portion arrangements, thus the tendency for the outer axle to rotate on the bearing elements of the first and second axle spindle. This may be an important feature since when raising, and especially lowering, a radar antenna or like it is preferred that the raising/lowing is performed in a controlled manner. This is facilitated if the friction between the abutting portions and the end portion arrangements can be controlled. Examples of adjustment means are provided in the following.
The presence of adjustment means enables that the pressure, and thus the friction, between the abutting portion of the axle spindle and the transverse surface of the outer axle, preferably via the radial bearing flange of the bearing element, may be kept on a constant level and that glitches can be avoided also as the radial bearing flange is worn. By re-tensioning, i.e. applying additional pressure, of the fastening means it is possible to compensate for possible loss of pressure force due to worn bearing.
In order to control the tendency for the outer axle to rotate it is sufficient that one of the first and second fastening means is provided with adjustment means. However, if both fastening means are provided with adjustment means this may be advantageous since possible wear will be reduced and/or evenly distributed between the two fastening means. The controllability is also improved if both fastening means are provided with adjustment means.
In the following a few examples of how respective end of the inner axle may be fastened by examples of fastening means to respective axle spindle is provided. The fastening means are provided for fastening respective end of the inner axle to the attachment portions.
According to a first example of the present disclosure at least one of the first or second fastening means, arranging one of the inner axle ends to one of the attachment portions of one of the axle support portions or directly to one of the axle support portion, wherein the axle support portions are part of respective axle spindles, comprises:
Fastening means as the most recently described has the advantage that no additional components are needed for fastening an inner axle end to the attachment portion or axle support portion. Also, this first example of the present disclosure does not require access the opposite side of the attachment portion or axle support portion than from which the inner axle is fastened, for fastening the inner axle end to the attachment portion or axle support portion.
According to a second examples of the present disclosure at least one of the first or second fastening means, arranging one of the axle ends to one of the attachment portions of one of the axle support portions, wherein the axle support portions are part of respective axle spindles, comprises:
Fastening means as the most recently described is a very simple, robust and reliable way of fastening an inner axle end to an attachment portion. Further, according to some examples the outwardly threaded end is configured such that when the inner axle end is fastened to the attachment portion of the axle support portion not all threading of the outwardly threaded end is used. By controlling the torque used when applying the screw-nut and by having the option to screw the screw-nut further onto the threaded end, thus tightening the screw-nut further, the fastening means provides the adjustment functionality of an adjustment means. By tightening the screw-nut the pressure force between the abutting portion of the axle spindle and the end portion arrangement of the outer axle, preferably via a radial bearing flange of a bearing element, will be increased and thus, the pressure force and friction can be controlled. The tightening operation is preferably performed by using a tool such as a torque wrench or like.
According to a third examples of the present disclosure at least one of the first or second fastening means, arranging one of the inner axle ends to one of the attachment portions of one of the axle support portion, wherein the axle support portions are part of respective axle spindles, comprises:
Fastening means as the most recently described also has the advantage that such fastening means also may be used to provide the adjustment functionality of an adjustment means. By controlling the tightening torque of the outwardly threaded member, which is dependent on how far into threaded opening the threaded member is screwed, it is possible to control the friction between the abutting portion, via the radial bearing flange if such is present, and respective end portion arrangement. Thus, as has been disclosed previously, the tightening operation is preferably performed by using a tool such as a torque wrench or like. Naturally, in order for the latter fastening means to provide the functionality of adjustment means the threaded opening and the outwardly threaded member has to be configured accordingly, meaning that it has to be possible to screw the outwardly threaded member further into the threaded opening of the inner axle.
According to other examples of the present disclosure at least one of the first and second inner axle ends is provided with a holding flange. The holding flange is configured to engage with an assembling tool. Such holding flange and assembling tool are advantageously used when the pivot axle arrangement is assembled.
Further, the pivot axle arrangement may be assembled by using a method, wherein the method comprises the steps of:
The assembling tool is arranged to the second end of the inner axle by means of a tool fastening arrangement which is configured to interconnect to an end of the assembling tool. The tool fastening arrangement may be in form of a square protruding flange or like.
According to other examples of the present disclosure a first fastener support portion is mounted in a first pivot axle fastener and a second fastener support portion is mounted in a second pivot axle fastener. The pivot axle arrangement, amongst others comprising the fastener support portions of the axle spindles and the outer axle, and the pivot axle fastener together form a pivot joint. The pivot axle fasteners may e.g. be mounted on the roof of a terrain vehicle and an antenna or like may be mounted to the axle such that the antenna is pivotal in relation to the terrain vehicle.
The present disclosure also refers to a radar antenna arrangement comprising a pivot axle arrangement according to the present disclosure. According to an exemplary embodiment of such radar antenna arrangement the antenna arrangement comprises a first and a second structural element. The first structural element may be in form of a fastening structure, wherein said fastening structure comprises two pivot axle fasteners, wherein the pivot axle arrangement is mountable to the fastening structure by said pivot axle fasteners. The first structural element may comprise a mast and a transmitting device, wherein the mast is arranged to the pivot axle arrangement and wherein the transmitting device is arranged to the mast. The arrangement provides that the first and second structural elements, thus the fastening structure and the mast, are pivotally arranged to each other by said pivot axle arrangement. The present disclosure further refers to a vehicle comprising the previously described radar antenna arrangement.
Further advantages and advantageous features of the disclosure are disclosed in the following description and in the dependent claims.
With reference to the appended drawings, below follows a more detailed description of embodiments of the present disclosure.
Further, as is disclosed in
A general problem with pivot axle arrangements 10′ as disclosed in
When the pivot axle arrangement 10′ is utilized in an application as disclosed in
However, also the forces in axial direction Fa the pivot axle arrangement 10′ may be exposed to may be significant. Referring to the exemplary embodiment of
The significant forces in axial direction Fa a pivot axle fastener 16′ may be exposed to also requires that the structural element 17′ the pivot axle fastener 16′ is fastened to can absorb significant forces. Looking at a simplified example; the axial force Fa1 directed in axial direction towards the pivot axle fastener 16′ A may propagate through the construction via the pivot axle fastener 16′ A to the structural element 17′, wherein, in simplified terms, the pivot axle fastener 16′ A may exert a twisting force Fc on the structural element 17′ (in addition to e.g. forces in radial direction Fr). Thus, also the structural element 17′ is required to withstand significant forces.
In order for the pivot axle fasteners 12′, and the pivot axle fasteners 16′, to have sufficiently high breaking point and be sufficiently rigid e.g. the thickness of the material may have to be increased and other materials may have to be used. This may add additional cost, additional weight and make the component as such more bulky. In order for the structural element 17′ to withstand the significant forces the structural element 17′ is exposed to also the properties of the structural elements 17′ has to be adapted to be stronger, thicker, more durable etc. This will also make the structural element 17′ more bulky, heavier etc. and ultimately this may lead to that it is impossible to implement the prior art pivot axle arrangement 10′ for certain applications, such as e.g. light weight vehicles.
It should be noted that in
The outer axle 111 comprises a first end portion arrangement 120 in a first end 140 of the outer axle 111 and second end portion arrangement 220 in a second end 240 of the outer axle 111. In the exemplary embodiment of
Respective transverse surface 130, 230 of respective end portion arrangement 120, 220 may be flat or, as according to the embodiment shown in
The first and second axle spindles 112, 212 further comprises a first and second axle support portion 115, 215. According to the embodiment shown in
Further, the first and second axle support portions 115, 215 are provided with a first and second bearing element 113, 213. According to the embodiment disclosed in
In the embodiment shown in
Respective first and second axle spindles 112, 212 are also provided with a respective first and second attachment portion 121, 221. The first and second attachment portions 121, 221 are forming a portion with a surface, wherein the surface is essentially perpendicular to a longitudinal direction of respective axle spindle 112, 212, covering the cross sectional are of respective first and second axle spindles 112, 212.
Essentially centrally, in a longitudinal direction, of the outer axle 111 an inner axle 161 is provided. In a first end 160 of the inner axle 161 the inner axle 161 is provided with a first fastening means 170 and in a second end 260 of the inner axle 161 the inner axle is provided with a second fastening means 270, wherein the first fastening means 170 is fastened to the first attachment portion 121 and the second fastening means 270 is fastened to the second attachment portion 221.
The first fastening means 170 comprises an inner axle threaded opening 190, an outwardly threaded member 191 and a first opening 193 in the first attachment portion 121. According to the embodiment shown in
The second fastening means 270 comprises an outwardly threaded end 194 of the inner axle 161, a screw-nut 195 and a second opening 196 in the second attachment portion 221. According to the embodiment shown in
The preferred embodiment of the present disclosure disclosed in
Referring now to the second fastening means 270 of
By configuring the second fastening means 270 such that the screw-nut 195 can be further tightened, thus that the screw-nut 195 can be further screwed onto the outwardly threaded end 194 of the inner axle 161, when the inner axle 161 is fastened to second attachment portion 221, as is disclosed in the embodiment shown in
Other adjustment means work in a similar way, the more they are tightened, the higher will the contact pressure be and the higher force has to be applied on order for the outer axle to be rotated in relation to the axle spindles.
Also the first fastening means 170 may provide this adjustment means functionality if the outwardly threaded member 191 and the threaded opening 190 of the first end 160 of the inner axle 161 is configured such that when the first end 160 of the inner axle 161 is fastened to the first attachment portion 170 the outwardly threaded member 191 can still be further screwed into the threaded opening 190.
Further, according to the embodiment disclosed in
The present disclosure has the advantage, unlike a prior art pivot axle arrangement as the one disclosed in relation to
Distributing the absorption of axial forces between both axle spindles 112, 212 and both pivot axle fasteners 116, 216 has the advantage that respective axle spindle 112, 212 and respective pivot axle fastener 116, 216 will be exposed to lower forces and consequently does not have to be dimensioned to withstand as high forces. Also, the pivot axle arrangement 110 becomes more rigid which increases the natural frequency of the system. Thus, possible other, less costly materials may be used and the material thickness does not need to be as high. Also, the structural requirements on the structural element 117 to which the pivot axle arrangement 110 is arranged, are less stringent.
First of all, an inner axle 162 of
Thus, in addition to the outwardly threaded portion 199 a first fastening means 171 of
In the embodiment disclosed in
The first attachment portion 122 of the embodiment disclosed in
Referring now to
It is to be understood that the present disclosure is not limited to the embodiments described above and illustrated in the drawings; rather, the skilled person will recognize that many changes and modifications may be made within the scope of the appended claims.
Cedertorn, Daniel, Östberg, Johan
| Patent | Priority | Assignee | Title |
| Patent | Priority | Assignee | Title |
| 3412404, | |||
| 4309708, | Apr 11 1980 | ATS ACQUISITION CORP | Vehicle mounting for a portable microwave antenna dish |
| 4663633, | Oct 15 1985 | Vehicle mounted satellite antenna system | |
| 5554998, | Mar 31 1995 | Winegard Company | Deployable satellite antenna for use on vehicles |
| 5999139, | Aug 27 1997 | Bae Systems Information and Electronic Systems Integration INC | Two-axis satellite antenna mounting and tracking assembly |
| 6421019, | Aug 20 2001 | Automatic vehicle mounted antenna deployment system | |
| 6573871, | Dec 14 1999 | KB Impuls Service GmbH | Transportable system and a method for producing communication connections |
| 7230581, | Aug 13 2004 | Winegard Company | Nomadic storable satellite antenna system |
| 7518569, | Sep 28 2007 | Winegard Company | Stabilizing mechanism for a deployed reflector antenna in a mobile satellite antenna system and method |
| 7815373, | Apr 19 2004 | INSITUTEC, INC | Symmetric spindle design |
| 20170346171, | |||
| EP291864, | |||
| EP2293378, | |||
| EP3235055, | |||
| WO2006020863, | |||
| WO2008128077, | |||
| WO2012164352, | |||
| WO2016099366, |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Dec 19 2014 | Saab AB | (assignment on the face of the patent) | / | |||
| Aug 14 2017 | CEDERTORN, DANIEL | Saab AB | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 043405 | /0347 | |
| Aug 14 2017 | ÖSTBERG, JOHAN | Saab AB | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 043405 | /0347 |
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